An up-and-coming rock star's body is found in a scene that appears staged from her recent music video.
Julian agrees to a weekend camping trip but struggles to fit in with Nathan and the guys. Back in Tree Hill, Brooke and Haley spend Girl’s Night doing a little bonding of their own, and Quinn helps Clay come to terms with a tragic loss. Meanwhile, Dan and Rachel’s past catches up to them.
Even though they do their best in order to be the perfect couple, Barney's attitude of know-it-all lands him in trouble with Robin and they are forced to seek Marshall and Lily for advice.
When Hiro travels three years into the past, he has a second chance to save Charlie from the hands of Sylar. However, Samuel’s presence serves to complicate Hiro’s mission even further. Elsewhere, H.R.G.’s past with his Primatech partner is revealed.
Sheldon becomes Leonard's teacher in order to understand football, while an incident with flying a kite threatens Howard and Raj's friendship.
Alan's advice to Chelsea that she get breast-reduction surgery is not met with enthusiasm by Charlie, who kicks him out, but staying with Evelyn has its own challenges.
Olivia says something she regrets during her appearance on Jimmy Fallon’s talkshow and tries to keep Dan from finding out. With election day around the corner, Nate suspects his grandfather will stop at nothing to get Trip elected to congress. In the midst of another feud with Serena, Blair befriends a new “it” girl and takes her to an election night party at Chuck’s hotel, hoping to make Serena jealous.
Two groomsmen wake up handcuffed together and covered in blood, with no memory of the raucous bachelor party the night before. Worse, the groom is missing...
While Jenn awaits her test results, Cassie is invited to New York City for her birthday and Lizzie takes a dramatic turn.
Cappie and Casey go public, and Omega Chi and Kappa Tau get serious about pranking. Things heat up when Song Fest pits ZBZ against Gamma Psi. Rusty and Dale take their rivalry out of the lab.
Bella tries to get close to Will but when Bella goes to his place she sees him with another girl. Meanwhile Lewis tries to test the water from the moon pool but gets caught by his teacher.
Peggy's taste in men proves questionable. Pete has to make a big decision about his career and a candidate makes a big impression on Don.
Sonny convinces Tawni to fire her manager, not realizing it's her mom. Meanwhile, Nico and Grady try to get past the new security guards.
The 1944 murder of a female pilot who flew noncombat missions for the U.S. during World War II is investigated. The victim was part of a civilian program that assisted the Army and Air Force. Meanwhile, the man who ran Lilly's car off a road is released from prison on bail.
Dexter knows it’s only a matter of time before Miami Metro discovers the Trinity Killer’s latest handiwork. Therefore, he has to work doubly hard to stay one step ahead of their investigation. Dexter has begun to realize that the closer he gets to Trinity, the more he stands to learn from this very different beast. Trinity hides behind a well-kept mask, and getting behind that facade will require some extra prodding on Dexter’s part. Meanwhile, Debra becomes frustrated when she finds herself shut out from her own case. She considers bending the rules in the name of justice, risking her career in the process. LaGuerta and Batista come to regret a major decision, and realize that by playing by the rules they may have painted themselves into a corner. And when the friction between Rita and Dexter comes to a head, Dexter gleans relationship advice from a most unlikely source.
When a beautiful young woman is murdered in her own home, police use high tech equipment and old fashioned police work to bring an unlikely killer to justice.
Bree begins to fall for Karl and drifts further from Orson. Katherine continues her sad attempts at seducing Mike, as her conflict with Susan grows. Gaby gets Juanita expelled from school. Lynette learns Tom is cheating on his mid-term, and Angie hides the truth about her mother.
Karen hatches a plan to move the family back to New York for good. Hank's mighty pleased, but Becca's crestfallen about leaving her new best friend, Chelsea. After inviting herself to Hank's class, Karen meets the comely ladies of the university: T.A. Jill Robinson and sexpot student Jackie. Later on, tempers flare when Becca and Chelsea get into some serious trouble and Hank and Karen are forced to pay a tense visit to Chelsea's parents, Felicia and Stacy Koons. Charlie is crushed when Marcy loudly consummates her girlhood-crush on Rick Springfield. But Sue Collini thinks up a creative way to restore Charlie's confidence.